The thermal damaging process of diorite under microwave irradiation

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Published Dec 1, 2018
DOI https://doi.org/10.3221/IGF-ESIS.47.06

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Xirui Lu
State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology,
Chen Yuan
School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China
Zeng Junsen
School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China
Hu Qijun
School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China
Shao Dadong
School of environmental and biological engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Zhang Haibin
Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
Lu Xirui
State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China

Abstract

Laboratory tests have been conducted to investigate the effects of thermal damage on diorite under microwave irradiation. The sample rocks were heated to high temperature range of 300 to 800 ℃ in a single-mode microwave furnace. The experimental results show that the rocks started to crack at 500 ℃ and completely disintegrated at 700 ℃. The intensities of quartz diffraction peaks were almost unchanged while the diffraction peak intensity of hornblende gradually decreased with temperature increasing. In addition, the chlorite diffraction peak disappeared at 500 ℃. The compressive strength of the sample decreased to 40% at 600 ℃ and it approached zero at 700 ℃. In this paper, the possible reasons for the thermal effects on the fracture of diorite were discussed, which can be related to water evaporation, thermal cracks and mismatch thermal expansion, and phase transition on quartz. The result indicates that diorite can be effectively destroyed under microwave irradiation.

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    Issue
    Vol. 13 No. 47 (2019): January 2019
    Section
    Miscellanea

    How to Cite

    Lu, X., Yuan, C., Junsen, Z., Qijun, H., Dadong, S., Haibin, Z., & Xirui, L. (2018). The thermal damaging process of diorite under microwave irradiation. Frattura Ed Integrità Strutturale, 13(47), 65–73. https://doi.org/10.3221/IGF-ESIS.47.06

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